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Changelog

Upcoming Release

  • Plumb through KVM_CAP_DIRTY_LOG_RING as DirtyLogRing cap.
  • Handle console riscv64 sbi call

v0.24.0

Added

  • Plumb through KVM_CAP_X2APIC_API as X2ApicApi cap.
  • [#334] Added support for KVM_HAS_DEVICE_ATTR and KVM_SET_DEVICE_ATTR vm ioctl on aarch64.

Changed

  • Rust edition 2024

v0.23.0

Added

  • [#322] Added VcpuFd::nested_state()and VcpuFd::set_nested_state() to work with nested KVM state. Only works on x86. The helper type KvmNestedStateBuffermakes these new functions easily usable.

Changed

  • Upgrade kvm-bindings to v0.13.0

v0.22.0

Changed

  • [#324] Upgrade kvm-bindings to v0.12.0
  • [#323] Upgrade vmm-sys-util to v0.14.0

v0.21.0

Added

  • [#310]: Added support for KVM_CAP_XSAVE2 and the KVM_GET_XSAVE2 ioctl.

Changed

  • [#310]: Changed set_xsave() unsafe because the C kvm_xsave struct was extended to have a flexible array member (FAM) in the end in Linux 5.16 and KVM_SET_XSAVE may copy data beyond the traditional size (i.e. 4096 bytes). If any features are enabled dynamically on Linux 5.16+, it is recommended to use set_xsave2() instead.
  • [#325]]: Changed set_gsi_routing() to use the newly created KvmIrqRouting type which is a FamStruct wrapper over kvm_irq_routing. This way we can safely call the ioctl without relying on the caller making sure the memory layout of kvm_irq_routing is sane.

v0.20.0

Added

  • [#288]: Introduce Cap::GuestMemfd, Cap::MemoryAttributes and Cap::UserMemory2 capabilities enum variants for use with VmFd::check_extension.
  • [#288]: Introduce VmFd::check_extension_raw and VmFd::check_extension_int to allow KVM_CHECK_EXTENSION to return integer.

Changed

  • [#305]: Updated kvm-bindings to 0.11.0.

Fixed

  • [#298]: Fixed incorrect usage of ioctl_wit_ref in the create_device method. Replace it with ioctl_wit_mut_ref as the passed parameter may be mutated by the ioctl.

v0.19.0

Added

  • [#275]: Introduce riscv64 ioctls.

Removed

  • [#289]: Drop x86 32-bit and arm 32-bit support.

Changed

  • [#273]: DeviceFd::get_device_attr is now marked as unsafe.
  • [#277]: Updated kvm-bindings to 0.9.1.

v0.18.0

Added

  • [#264]: Added KVM_SET_USER_MEMORY_REGION2, KVM_CREATE_GUEST_MEMFD and KVM_SET_MEMORY_ATTRIBUTES ioctls.
  • [#267]: Added HypercallExit field to VcpuExit::Hypercall and added ExitHypercall to Cap.
  • [#270]: Added MemoryFaultInfo to Cap and propagated MemoryFault exit reason in KVM_RUN.

v0.17.0

Changed

  • [#255]: Fixed a soundness issue when accessing the kvm_run struct. VcpuFd::run() and VcpuFd::set_kvm_immediate_exit() now take &mut self as a consequence.
  • [#260]: Updated kvm-bindings to 0.8.0.

v0.16.0

Added

  • [#242] x86: add support for SMI injection via Vcpu::smi() (KVM_SMI ioctl).
  • [#241] Add support for userspace MSR handling.
  • [#246] Add support for userspace NMI injection (KVM_NMI ioctl).
  • [#244] add support for coalesced MMIO (KVM_CAP_COALESCED_MMIO / KVM_CAP_COALESCED_PIO)

Changed

  • [#234] vcpu: export reg_size as a public method.
  • [#243] derived the Copy trait for IoEventAddress and NoDatamatch.

v0.15.0

Added

  • [#230] Added check_extension_raw method to use raw integer values instead of Cap enum.
  • [#228] arm64: add support for vCPU SVE feature.
  • [#219] Add Cap::ArmPtrAuthAddress and Cap::ArmPtrAuthGeneric capabilities.

v0.14.0

Added

  • [#219] Support for KVM_GET_MSR_FEATURE_INDEX_LIST and KVM_GET_MSRS system ioctls.
  • [#221] Add Cap::ArmPmuV3.

Changed

  • [#223] aarch64: Updated get/set_one_reg to support different registers sizes through byte slices.

v0.13.0

Added

  • [#213] Add Kvm::new_with_path() and Kvm::open_with_cloexec_at() to allow using kvm device files other than /dev/kvm.

v0.12.0

Added

  • [#187] Support for KVM_SET_IDENTITY_MAP_ADDR
  • Derive Debug for all exported structs and enums
  • [#189] Expose KVM_SET_ and KVM_HAS_DEVICE_ATTR for vcpu
  • [#191] Add KVM_TRANSLATE support and the translate_gva function that translates guest virtual address to the physical address
  • [#190] Enable usage of sync_regs to allow bulk getting and setting of general purpose registers, reducing the number of ioctls needed.
  • [#198] Return details about KVM_EXIT_FAIL_ENTRY in vCPU run
  • [#199] Add register_irqfd_with_resample so that irqfd + resaplefd can be registered through KVM_IRQFD
  • [#202] Add KVM_CAP_GUEST_DEBUG_HVM_DPS/WPS
  • [#202] Added check_extension_int which allows checking the capabilities that return numbers instead of booleans

Changed

  • Updated vmm-sys-util to 0.11.0
  • Updated kvm-bindings to 0.6.0
  • Upgraded to rust 2021 edition
  • Switched to specifying dependencies using caret requirements instead of comparision requirements
  • [#195] Do not panic on unsupported KVM_EXIT reason
  • [#196] Expose a mutable reference to the kvm_run structure to allow proper handling of unsupported exit reasons
  • [#200] Fix wrong target_arch gate preventing set_guest_debug from being exported on ARM
  • [#206] use u128 in get/set_on_reg

v0.11.0

Added

  • [#178] Support for the AMD Security Encrypted Virtualization (SEV) through the following VM ioctls: encrypt_op, encrypt_op_sev, register_enc_memory_region and unregister_enc_memory_region.
  • [#184] DeviceFd now derives Debug.

v0.10.0

Changed

  • Now depends on kvm-bindings >=0.5.0 which replaced the v4.20 KVM bindings with the v5.13 ones.
  • Updated VcpuExit::Debug to return architecture specific information for the debug event.

v0.9.0

Added

  • Support for accessing and controlling the Time Stamp Counter on x86 platforms through the get_tsc_khz and set_tsc_khz functions.

Changed

  • Updated create_vm on aarch64 to create a VM fd from the KVM fd using the host's maximum IPA size.

v0.8.0

Added

  • Support for specifying VM type (an opaque platform and architecture specific constant) when creating a VM (KVM_CREATE_VM ioctl) via the Kvm::create_vm_with_type function.

Changed

  • Now depends on kvm-bindings >=0.4.0 to support use of a newer vmm-sys-utils dependency.

v0.7.0

Added

  • Support for the system API that returns the maximum allowed vCPU ID (KVM_CAP_MAX_VCPU_ID).
  • Support for KVM_MEMORY_ENCRYPT_OP.

Fixed

  • [#119]: Disallow invalid number of cpuid entries to be passed to get_supported_cpuid and get_emulated_cpuid.

Changed

  • [#123]: Updated create_vcpu to use u64 as the parameter for the number of vCPUs.

v0.6.0

Added

  • Support for the vcpu ioctls: KVM_SET_GUEST_DEBUG, KVM_KVMCLOCK_CTRL, and KVM_GET_REG_LIST.
  • Support for the vm ioctl KVM_GET_DEVICE_ATTR.
  • Support for the device ioctl KVM_HAS_DEVICE_ATTR.
  • Support for VcpuExit::Debug.
  • Support for enabling vcpu capabilities using Vcpu::enable_cap.
  • Support for checking Hyper-V (HypervSynic and HypervSynic2), MSI (MsiDevid), and IPA Size (ArmVmIPASize) capabilities. using kvm.check_extension.
  • Support for checking the VM capabilities via Vm::check_extension.
  • Create a VM with flexible IPA size using Kvm::create_vm_with_ipa_size.

Removed

  • Removed Kvm::new_with_fd_number. The same functionality is offered by the Kvm FromRawFd trait implementation.

Changed

  • The VM ioctl unregister_ioevent now correctly unregisters the events that correspond to the data match passed as a parameter.
  • The SystemEvent Vcpu Exit now also contains the relevant type and flags.
  • Updated get_dirty_log such that it does not assume the page size is 4K, but instead reads it using libc::sysconf.

v0.5.0

Added

  • Support for the vcpu ioctls KVM_GET/SET_VCPU_EVENTS and KVM_GET_DIRTY_LOG on aarch64.
  • Support for the vcpu ioctl KVM_IRQ_LINE.

v0.4.0

Added

  • Support for unregistering ioeventfds through KVM_IOEVENTFD.

Changed

  • Functions working with event FDs now require vmm_sys_util::eventfd::EventFd in their interface instead of RawFd.
  • Functions working with FAM structs kvm_msr_list and kvm_msrs, were changed to work with their respective safe counterparts MsrList and respectively Msrs.
  • Now exporting kvm_ioctls::Error type definition so that users of this crate can create their own wrapping errors without having to know the Error type used internally by this crate.
  • No longer exporting kvm_ioctls::Result. Users of this crate should not have to use kvm_ioctls::Result outside the crate.
  • kvm_ioctls::Error now works with errno::Error instead of io::Error.

Removed

  • CpuId safe wrapper over FAM struct kvm_cpuid2. The safe wrapper is now provided by the kvm_bindings crate starting with v0.2.0.
  • KVM_MAX_MSR_ENTRIES and MAX_KVM_CPUID_ENTRIES. Equivalent constants are provided by the kvm_bindings crate starting with v0.2.0.

v0.3.0

Added

  • Support for setting vcpu kvm_immediate_exit flag
  • Support for the vcpu ioctl KVM_GET_CPUID2
  • Support for the vcpu ioctl KVM_GET_MP_STATE
  • Support for the vcpu ioctl KVM_SET_MP_STATE
  • Support for the vcpu ioctl KVM_GET_VCPU_EVENTS
  • Support for the vcpu ioctl KVM_SET_VCPU_EVENTS
  • Support for the vcpu ioctl KVM_GET_DEBUGREGS
  • Support for the vcpu ioctl KVM_SET_DEBUGREGS
  • Support for the vcpu ioctl KVM_GET_XSAVE
  • Support for the vcpu ioctl KVM_SET_XSAVE
  • Support for the vcpu ioctl KVM_GET_XCRS
  • Support for the vcpu ioctl KVM_SET_XCRS
  • Support for the vm ioctl KVM_GET_IRQCHIP
  • Support for the vm ioctl KVM_SET_IRQCHIP
  • Support for the vm ioctl KVM_GET_CLOCK
  • Support for the vm ioctl KVM_SET_CLOCK
  • Support for the vm ioctl KVM_GET_PIT2
  • Support for the vm ioctl KVM_SET_PIT2
  • Support for the vcpu ioctl KVM_GET_ONE_REG

Changed

  • Function offering support for KVM_SET_MSRS also returns the number of MSR entries successfully written.

v0.2.0

Added

  • Add support for KVM_ENABLE_CAP.
  • Add support for KVM_SIGNAL_MSI.

Fixed

  • Fix bug in KvmRunWrapper. The memory for kvm_run struct was not unmapped after the KvmRunWrapper object got out of scope.
  • Return proper value when receiving the EOI KVM exit.
  • Mark set_user_memory_region as unsafe.

v0.1.0

First release of the kvm-ioctls crate.

The kvm-ioctls crate provides safe wrappers over the KVM API, a set of ioctls used for creating and configuring Virtual Machines (VMs) on Linux. The ioctls are accessible through four structures:

  • Kvm - wrappers over system ioctls
  • VmFd - wrappers over VM ioctls
  • VcpuFd - wrappers over vCPU ioctls
  • DeviceFd - wrappers over device ioctls

The kvm-ioctls can be used on x86_64 and aarch64. Right now the aarch64 support is considered experimental.